ICRF wall conditioning and plasma performance on EAST

  title={ICRF wall conditioning and plasma performance on EAST},
  author={Xiang Gao and Jianbao Hu and Y. P. Zhao and Xianzu Gong and Yaowei Yu and Guangnan Luo and Houyang Guo and Shigeru Morita and Liqun Hu and Jiale Chen and Huiqian Wang and Xiuyan Wang and Xiaoyuan D. Zhang and Jiuyuan Li},
  journal={Journal of Nuclear Materials},
Abstract ICRF (ion cyclotron resonance frequency) wall conditioning was performed on EAST superconducting tokamak. It included ICRF cleaning in-between shots, boronization associated with ICRF plasmas, and ICRF oxidation with an ITER-relevant full metallic wall material. A dedicated ICRF antenna was developed for wall conditioning on EAST. The RF frequency is 30 MHz, and maximum output power of RF system is 300 kW. The duty time of pulsed ICRF wave was set at 0.3 s on and 1.2 s off in presence… Expand
18 Citations
ICRF (ion cyclotron range of frequencies) discharge cleaning with toroidal and vertical fields on EAST
ICRF (ion cyclotron range of frequencies) discharge cleaning with a toroidal field and an additional vertical field was carried out on EAST recently. With the injected ICRF power of 10 kW, HeExpand
Vacuum and wall conditioning system on EAST
EAST is a non-circular advanced steady-state experimental device and the first entirely superconducting tokamak in the world. Vacuum system is one of the most important sub-systems of EAST device.Expand
Recent results of boronization on EAST and HT-7 superconducting tokamak
Abstract The importance of wall conditionings for the reduction of the impurities in plasmas has been recognized in most tokamaks. Boronization associated with Ion Cyclotron Resonance FrequencyExpand
Wall conditioning on ITER
Abstract Like all tokamaks, ITER will require wall conditioning systems and strategies for successful operation from the point of view of plasma-facing surface preparation. Unlike today’s devicesExpand
Development of the High Radio Frequency Power Amplifiers for ICRF Heating in EAST
Abstract High radio frequency (rf) power amplifiers were designed as a part of research and development of an ion cyclotron range of frequency (ICRF) system that aimed at long-pulse operation at theExpand
Investigation of runaway electrons in the current ramp-up by a fully non-inductive lower hybrid current drive on the EAST tokamak
The possibility of using a lower hybrid wave (LHW) to ramp up the plasma current (Ip) from a low level to a high enough level required for fusion burn in the EAST (experimental advancedExpand
Development of a helicon-wave excited plasma facility with high magnetic field for plasma–wall interactions studies
The high magnetic field helicon experiment system is a helicon wave plasma (HWP) source device in a high axial magnetic field (B0) developed for plasma–wall interactions studies for fusion reactors.Expand
Comparison of various wall conditionings on the reduction of H content and particle recycling in EAST
Reductions in H content and particle recycling are important for the improvement of ion cyclotron range of frequency (ICRF) minority heating efficiency and the enhancement of plasma performance ofExpand
Characterization of runaway-triggered spikes discharge in the EAST tokamak
In this paper, we investigate a regime of runaway discharges that is characterized by a strong enhancement of the relaxation oscillations seen in the electron cyclotron emission, Hα, visibleExpand
Spectroscopic Measurements of Impurity Spectra on the EAST Tokamak
Ultraviolet (UV) and visible impurity spectra (200~750 nm) are commonly used to study plasma and wall interactions in magnetic fusion plasmas. Two optical multi-channel analysis (OMA) systems haveExpand


Wall conditioning technique development in Tore Supra with permanent magnetic field by ICRF wave injection
Abstract Wall conditioning techniques tokamaks with a permanent magnetic field have been performed in Tore Supra by using an ion cyclotron range frequency (ICRF) facility. Plasmas have been producedExpand
ICRF boronization - A new technique towards high efficiency wall coating for superconducting tokamak reactors
A new technique for wall conditioning that will be especially useful for future larger superconducting tokamaks, such as ITER, has been successfully developed and encouraging results have beenExpand
ICRF wall conditioning at TEXTOR-94 in the presence of a 2.25 T magnetic field
To investigate alternative conditioning concepts for future fusion devices with permanent magnetic fields, plasmas produced by the coupling of ICRF power to He and gas mixtures of Helium + silane,Expand
He–ICR cleanings on full metallic walls in EAST full superconducting tokamak
Abstract He–ICR cleanings were successfully carried out in 2006–2007 on the full superconducting tokamak (EAST), which is an ITER-relevant experimental tokamak. Factors influence on He–ICRExpand
Physical Engineering Test and First Divertor Plasma Configuration in EAST
Physical engineering capability on the superconducting magnetic system of EAST was tested and first divertor plasma configuration in EAST was obtained. The extrapolation of the safety limit hasExpand
Quench current measurement and performance evaluation of the EAST toroidal field coils
Abstract The EAST device (original name is HT-7U) is a superconducting tokamak being constructed at the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP). The toroidal field (TF)Expand
Comparison of O-ICR wall conditionings for limiter configuration in HT-7 and divertor one in EAST
Abstract Ion cyclotron resonance discharge-associated oxidation (He/O-ICR) wall conditioning was successfully carried out on full metallic material walls for a divertor configuration in EAST. WithinExpand
Extension of operational limits on EAST
The first plasma has been achieved successfully in the Experimental Advanced Superconducting Tokamak (EAST). Boronization by the glow discharge (GDC) method was studied in experiments. The plasmaExpand
Overview of steady state operation of HT-7 and present status of the HT-7U project
Significant progress has been made on the HT-7 superconducting tokamak recently. Repeatable plasma discharges for up to 10.7 s have been routinely obtained, which nearly reached the present limit ofExpand
Diagnostics for first plasma study on EAST tokamak
Abstract The first plasma was obtained in the EAST on September 26th, 2006. Single-null (SN) and double-null (DN) diverted plasmas were achieved successfully in the EAST tokamak on January 22nd,Expand